Delavan, WI: PFAS Found in Water - Home Safety 50/100
1 ZIP code · 5 water systems · Updated
ZipCheckup grade for Delavan: D.
Federal records show several conditions worth reviewing.
The grade shown for Delavan, WI falls at D or F, taken from the average of the composite Home Safety Scores of the city's scored ZIP codes. That composite can draw on several kinds of data, such as drinking water records, radon zone designations, PFAS monitoring and air quality, so a low grade does not by itself show which factor weighed most or what any single tap delivers. The report for your own ZIP code is the place to look at the pieces behind the number where you live.
How Delavan Compares
Data: EPA SDWIS
Delavan Water: The Quick Version
- Your city's water systems recorded 69 violations since 2021.
- Average of reported 90th-percentile lead results: 0.016 mg/L. The EPA action level of 0.015 mg/L applies to each water system's own 90th percentile, not to this average.
- Homes built before 1986: 63% - older plumbing may contain lead solder.
- Estimated remediation: $4,080 per household.
- Health risk index (ZipCheckup composite of CDC data): 12.73.
Water Systems Serving Delavan
More than one public water system is linked to Delavan, WI: federal records tie 5 systems to the area, and the 3 with the largest reported service populations are shown below. Which of them supplies a particular address depends on where the property sits, and a water bill or the utility can confirm it.
- D
- D
- D
Overview
We track home safety data for 1 ZIP code in Delavan, Wisconsin, covering 5 community water systems serving approximately 16,056 people. The EPA snapshots used for this build directly map water systems to 1 of 1 ZIP codes.
1 of 1 ZIP code with a reported violation count in the available EPA record (100%) have recorded EPA violations. 2 health-based violations appear in the available health breakdown.
Home Safety Score
Average Home Safety Score for Delavan: D (50/100)
Model 4.0.0 uses four measured components across three equally weighted domains. If a required domain is unavailable, no score is published:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| PFAS MCL Screen | UCMR 5 testing against the covered federal MCLs |
| Radon Risk | EPA radon zone classification |
| Annual AQI | EPA AirData county-year median with at least 90 observed days |
Water Sources
Delavan water systems draw from: Groundwater.
Lead & Copper
- Average of reported 90th-percentile lead results: 0.0160 mg/L (exceeds EPA action level) (EPA action level: 0.015 mg/L)
- 1 of 1 ZIP code with known status exceed the EPA lead action level
Radon Risk
1 of 1 ZIP records with known zones is in EPA Radon Zone 1.
The EPA recommends testing all homes regardless of radon zone. County radon zones cannot replace an in-home radon test.
Top Contaminants
| Contaminant | Category | Violations | ZIPs Affected |
|---|---|---|---|
| Lead and Copper Rule | Treatment Technique | 22 | 1 |
| Consumer Confidence Rule | Reporting | 8 | 1 |
| Revised Total Coliform Rule | Microbiological | 6 | 1 |
| Nitrate | Inorganic | 4 | 1 |
| 1,2,4-Trichlorobenzene | Organic | 4 | 1 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 53115 | D | 69 | 2 | Delavan Waterworks |
All ZIP Codes in Delavan
- 53115 [D] - 69 violations ⚠
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
Reporting periods vary by source. Missing data is shown as unavailable, not as zero.
CDC Health Data for Delavan
Source: CDC PLACES (County-level estimates). County health indicators are shown for context only and are not linked to this area's water records.
Compared to National Average
Vertical line = national average. ■ Above national · ■ Below national
Key Contaminants Detected in Delavan
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
How Old Is Delavan's Housing Stock?
With 63% of homes built before 1986, lead solder in plumbing is a potential concern. Federal law banned lead solder in drinking-water plumbing in 1986, but many older homes retain original plumbing.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
Plumbing risk in older housing is tied to the period before 1986, when lead pipes and lead solder were still permitted in new plumbing. Delavan's median build year is 1976, and properties from before that year might still contain lead-bearing joints or pipes. Much of that risk sits inside individual properties, which city-level water quality averages don't capture.
Over half of homes in Delavan were built before 1986, when federal law began restricting lead solder in drinking-water plumbing. Older plumbing may leach lead into drinking water, especially with corrosive water chemistry.
Source: U.S. Census Bureau ACS B25034.
Delavan: Remediation Cost in Perspective
For Delavan, the dollar estimate below represents a middle share of local property values: more than one percent, and two percent at most.
Estimated remediation costs in Delavan can be compared with local home values. The estimated $2,670–$5,640 range is a planning estimate; get a property-specific quote and check it against your budget. Home values are 2% below the Wisconsin average.
Protecting Children from Lead in Delavan
Why children are most at risk: The CDC states that no safe blood lead level in children has been identified. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.
A citywide figure cannot tell a family in Delavan what its own faucet delivers. Here, averaging each ZIP code's 90th-percentile lead value gives more than 15 micrograms per liter, and pre-1986 homes account for 63% of the housing.
1 ZIP code (100% of the city's ZIP records) is served by a water system whose 90th-percentile lead result exceeds the EPA action level of 0.015 mg/L.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Historical Flood-Claim Evidence for Delavan
Historical NFIP data for Delavan contains 2 flood insurance claims. Among claims with payment data, the average reported building, contents, and ICC component sum is $3,849. Among ZIP codes with claim records, 0% have an A- or V-family dominant rated zone recorded in those historical claims. This is not a complete current FEMA property-map inventory.
How flooding affects water quality: Flood events can introduce sewage, agricultural runoff, and industrial chemicals into water supplies. Even after floodwaters recede, contamination can persist in wells and aging infrastructure. The $4,080 remediation estimate shown here excludes flood insurance and is not derived from NFIP claim count.
Claim count does not establish current property risk. Check the exact address in FEMA's current map and obtain a property-specific insurance quote when relevant.
Source: historical FEMA National Flood Insurance Program (NFIP) claim records. No current FEMA property-map designation is asserted.
What You Can Do in Delavan
- Test your water at home. City-level data shows averages - your tap may differ. Consider testing your home's tap water for lead, since household plumbing can affect its level.
- Install a certified water filter. For Lead and Copper Rule, listed in the water-quality records for Delavan: if it is a rule or reporting requirement rather than a contaminant, ask your utility what the record involved; for bacteria, follow any boil-water notice from your utility; for a specific chemical contaminant, check whether a filter is certified to reduce it. Not every contaminant has a consumer filter certification.
- Check your home's plumbing. With 63% of homes built before 1986, lead solder is a real possibility.
- Review your water system's CCR. If you use a community water system, request its annual Consumer Confidence Report for system-level test results or find it online.
Deep Dive Reports
Detailed analysis for Delavan, WI